The T2 Virgin lounge is not available to Priority Pass members after 12:30pm. Aside from that, to stay airside you would need to catch a bus from the far north end of TBIT than head back back on a bus again for your flight.
Here's a review of the KAL lounge:
https://onemileatatime.boardingarea....geles-airport/
Last edited by serfty; Apr 29, 2018 at 9:22 pm